I assume he’s asking about the monthly subscription YouTube Music Premium, not just DJing with audio from YouTube videos (public uploads).
As with DJ software that supports streaming services, it’s impractical to support every single service out there, especially as most are aimed at the consumer for personal use, not DJs for public performance.
If you want to use streamed music, simply switch to a provider that is supported. There are sites and apps that will convert playlist, favourites etc.